Burglar-alarm.



C. E. G. EDEY.

BURGLAR ALARM.

APPLIOATION FILED D30.1e,1907.

909,851 Patented Jan. 12, 1909.

3 SHEETS-SHEET 1.

// nuzntoz Stro l/"up 05.0mm BURGLAR ALARM.

APPLICATION FILED DEO.16, 1907.

Patented Jan. 12,1909.

3 SHEETS-SHEET 2.

51mm "for 1n: NORRIS PETERS co. wasmucwmv, 04 c.

C. E. O. EDEY.

BURGLAR ALARM.

APPLIOATION FILED DBO.16,1907.

909,851 Patented Jan. 12, 1909.

BSHEETS-SHEET 3.

Illl #45 A i f v \\\\\\\\\\IfAV//l THE Ncmns PETERS ca. WASHINGTON, nc.

UNITED STATES PATENT OFFICE.

CHARLES E. C. EDEY, OF TACOMA, WASHINGTON, ASSIGNOR OF ONE-FOURTH TO ALFRED S. EDEY AND ONE-FOURTH TO DUNBAR F. EDEY, BOTH OF TACOMA, WASHlNGTON.

BU'RGLAR-ALARM.

Specification of Letters Patent.

Patented Jan. 12, 1909.

Application filed December 16, 1907. Serial No. 406,761.

To all whom it may concern:

Be it known that I, CHARLES E. C. EDEY, a citizen of the United States, residing at Tacoma, in the county of Pierce and State of \Vashington, have invented certain new and useful improvements in Burglar-Alarms; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in alarms and particularly to burglar alarms that are designed to be put in operation upon the opening of a door, window, or the like by an unauthorized person.

The invention further comprises the provision of an alarm mechanism, a cam for regulating the action of the alarm mechanism, and means for regulating the position of the cam.

The invention further comprises the provision of a pivotally mounted lever designed to be moved by a door or the like to operate a cam so that when the door operates the lever the cam will be moved, the movement of the cam being designed to throw into or out of operation an alarm.

The invention still further comprises the provision of alarm mechanism designed to be automatically set into operation, means for throwing the operating means out of operative position, and a push button and connecting mechanism for using the alarm as an ordinary door bell.

The object in View is the provision of an alarm that may be thrown to an inoperative position during the day and again put in operative position during the night, so that an unauthorized person cannot enter without sounding the alarm.

Another object in View is the provision of an alarm mechanism and means for operating the same, together with a push button and connecting mechanism arranged to use the alarm mechanism as an ordinary door bell.

WVith these and other objects in view the invention comprises certain novel constructions, combinations and arrangements of parts that will be hereinafter more fully described and claimed.

In the accompanying drawing :Figure 1 is a perspective fragmentary view of a door and jamb with an alarm formed according to the present invention secured thereto. Fig.

2 is a vertical section through the alarm and surrounding mechanism taken approximately on line 22 of Fig. 3. Fig. 3 is a top plan view of an alarm mechanism formed according to the present invention, the mechanism being shown in an inoperative position. Fig. 4 is a top plan view of an alarm mechanism formed according to the present invention, the same being shown set. Fig. 5 is a detail view showing the lever in normal position. Fig. 6 is a similar view showing the lever moved to position to spring the alarm. Fig. 7 is a detail view of the lever for rendering the alarm ineii'ective.

In providing a burglar alarm it is desirable to so construct the same as to make a device that will give a positive alarm and one that is comparatively cheap and easily s ecured in place. In the accompanying drawings will be seen the preferred embodiment of my invention which is designed to accomplish these results and others as hereinafter pointed out.

Referring more particularly to the drawings, 1 indicates a door jamb or the like to which the alarm or bell 2 is designed to be secured.

3 is a door having secured thereto a stop 4 that engages the end of lever 5. Lever 5 is designed to be pivotally mounted at 6 and extend over to a position opposite the escapement wheel 7, forming part of the mechanism of bell 2. In regard to hell 2, it is to be noted that any desired kind of bell may be used which is provided with an escapement as 7.

Secured to the end of lever 5 at a position opposite to escapement 7, and formed integral with lever 5 is a cam S.

A spring 9 is designed to be placed against the outer casing or base of bell 2 and bears at one end against a stop 10 and is rigidly secured to lever 5 for normally holding cam 8 beneath spring 11 and in proximity to escapement wheel 7. Spring 9 is preferably formed from spring wire and given a turn around pivotal member 6, as clearly seen in Figs. 3 and 4.

The lever 5 is formed opposite the end to which cam 8 is secured with an extension 12 that is designed to be engaged by stop 4: when the door is closed.

Secured to the base 13 of bell 2 is a spring 11 that is preferably secured at 14 and extends entirely across the base 13, an aperture 15 being formed for accommodating the shaft 16 of the bell. Spring 11 is provided with an extension or catch 17 thatacts as a pawl for engaging the teeth of escapement wheel 7. Preferably the pawl 17 is pressed or stamped from the spring 11 and is so formed as to project in the way or path of" movement of escapement wheel 7 so that 5., and forces the same inward as seen in Fig.

3,and cam 8 is moved out as seen in Figs. 2 and 3, and spring 11 is permitted to bring pawl 17 :into engagement with escape nent wheel 7. V hen door 3 is open, spring 9 will force the end of lever 5, carrying member 12, outward and also force inward cam 8, which in turn will engage the end of spring 11 and force upward its extension pawl 17, so that e capement wheel 7 is permitted to rotate freely. \Vhen escapement wheel 7 isv permitted to rotate, the remaining mechanism of the bell is permitted to operate for sounding or ringing the bell in the usual manner. This ringing of the bell will con-. tinue until the spring, or other motive power used, is exhausted or until cam 8 is removed from engagement with spring 11.

It is designed to. use the bell 2 as a door bell as well as a burglar alarm and in order to prevent the bell from ringing when the door is opened, a lever 19 is pivotally mounted at 20, in asecuring member 21. Lever 19 is formed with a bent over or cam member 22, and pivotal member 20 is positioned so that when lever 19 is forced over against the bell, and lever 5 is also released, the cam 8 on lever 5 is forced under the end of spring 11, thus raising pawl 17, when wheel 7 will be permitted to freely rotate, but when lever 19 is forced to a substantial right-angle with the bell, as seen in Fig. 3, lever 5 is held so. thatcam 8 is out of engagement with spring 11 and consequently pawl 17 is in engage ment with escapement wheel 7, and the bell is prevented fromringing or sounding an alarm. An off-set portion 23 is provided in lever 5 against which the bent over portion 22 of lever 19 rests when in an open position, as seen in Fig. 3.. This limits the open or outward movement of lever 19 andinsures a correct position for the same when it is desired to disconnect or make inoperative the burglar alarm mechanism. \Vhen lever 19 is in this position the bell 2 may be sounded by pressing upon push button 24 as clearly seen in Fig. 2. WVhen push button 24 is pressed, motion is transmitted from the pressesagainst spring 11 which now acts as resilient spring for the'door bell, so that when power is applied to p'ushbutton 24, the same will be exerted upon spring 11 for moving the same and raising pawl 17 out of engagement with escapement wheel, 7. 'VVhen' pawl 17 is out of'enga'gernent with escapenient wheel 7 ,bell 2 will ring as heretofore described, but when the button 24 is released the spring releases the pawl 17 to engagement with the wheel 7, thus stopping the ringing of the bell.

The operation of, theburglaralarm is as, f llows=".On the door being opened by a burglar r oth unauthorized person, the portionl2 (see, Fig. 4) is thrown out by the spring 9,-as, shown in said figure, and the opposite end of lev r 5, having the am ,8, as better shown in Fig. 3, passes said cam 8 under that part of the spring ll, bearing the hook out of engagement with the wheel 7, allowing the wheel 7 to. rotate and thealarm to. ri g. i

To change, the burglar alarm to a doorbell it is only necessary to throw out the pawl 19' is-shown in Fig. 3, whereupon its downward portion, as at 23,, takes against the. inner edge of lever 5 and throws that end in that position, the alarm is inoperative as an alarm, but as w1ll be readily seen, on reference to Fig. 2, is still operative as a .door' bell, and on pushing the 'button at, 24 the. spring 11 with its engagingpawl 17 drawn upward away from the wheel 7. When this happens, wheel 7 rotates and the bell rings until the pressure beingremoved from the button 24,-the pawl 17 returns to its engage ment with wheel 7 and, locking said wheel, stops the ringing of the bell. By this construotion the bell will ring simply as a door bell and will ring only as long" as button; 24 is pressed and will ceaseto ring immediately upon the releasingof the button. It will be understood that push button 24 will operate bell 2, even though lever 19is in the position shown in Fig. 4, and the burglar alarm mechanism isv set for operation.

WVhat I claim is K I. In a burglar alarm the combination.

same through a bar or shaft, 25 as one end mally preventing rotation. of Said. wheel, a 1

lever for disengaging the said means upon opening of said door, the said lever being pivoted intermediate its ends and having one end arranged for engagement by the door and the other end engaged normally with the said means, and a pivoted cam lever movable to position to engage the first mentioned lever to one side of its pivot and hold its ends out of engagement with the door and the escapement holding means.

3. In a burglar alarm the combination with a door, of an escapement mechanism ineluding an escapement wheel, a leaf spring provided with a projection normally engaged with the escapement wheel to prevent the rotation thereof, a pivoted lever arranged at one end for engagement with said door and provided at its other end with a cam portion engageable with the said projection to disengage the same from the escapement wheel, and a cam lever for rendering said pivoted lever inoperative.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES E. O. EDEY. Witnesses:

KAY SMITH, EDWARD L. PARSONS. 

